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Ensure compatibility with Rust 1.0.0.

This commit is contained in:
nwin 2017-01-22 10:13:50 +01:00
parent d25f53056d
commit ee9d474243
1 changed files with 1 additions and 77 deletions
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78
traits/src/ops/wrapping.rs
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@ -1,4 +1,4 @@
use std::ops::{Add, Sub, Mul, Div, Shl, Shr};
use std::ops::{Add, Sub, Mul};
macro_rules! wrapping_impl {
($trait_name:ident, $method:ident, $t:ty) => {
@ -75,79 +75,3 @@ wrapping_impl!(WrappingMul, wrapping_mul, i16);
wrapping_impl!(WrappingMul, wrapping_mul, i32);
wrapping_impl!(WrappingMul, wrapping_mul, i64);
wrapping_impl!(WrappingMul, wrapping_mul, isize);
/// Performs division that wrapps around on overflow.
pub trait WrappingDiv: Sized + Div<Self, Output=Self> {
/// Wrapping (modular) division. Computes `self / other`, wrapping around at the boundary of
/// the type.
///
/// The only case where such wrapping can occur is when one divides `MIN / -1` on a signed type
/// (where `MIN` is the negative minimal value for the type); this is equivalent to `-MIN`, a
/// positive value that is too large to represent in the type. In such a case, this function
/// returns `MIN` itself.
///
/// # Panics
///
/// This function will panic if rhs is 0.
fn wrapping_div(&self, v: &Self) -> Self;
}
wrapping_impl!(WrappingDiv, wrapping_div, u8);
wrapping_impl!(WrappingDiv, wrapping_div, u16);
wrapping_impl!(WrappingDiv, wrapping_div, u32);
wrapping_impl!(WrappingDiv, wrapping_div, u64);
wrapping_impl!(WrappingDiv, wrapping_div, usize);
wrapping_impl!(WrappingDiv, wrapping_div, i8);
wrapping_impl!(WrappingDiv, wrapping_div, i16);
wrapping_impl!(WrappingDiv, wrapping_div, i32);
wrapping_impl!(WrappingDiv, wrapping_div, i64);
wrapping_impl!(WrappingDiv, wrapping_div, isize);
/// Performs bitwise shift left that wrapps around on overflow.
pub trait WrappingShl<RHS>: Sized + Shl<RHS, Output=Self> {
/// Panic-free bitwise shift-left; yields `self << mask(rhs)`, where `mask` removes any
/// high-order bits of rhs that would cause the shift to exceed the bitwidth of the type.
///
/// Note that this is *not* the same as a rotate-left; the RHS of a wrapping shift-left is
/// restricted to the range of the type, rather than the bits shifted out of the LHS being
/// returned to the other end. The primitive integer types all implement a `rotate_left`
/// function, which may be what you want instead.
fn wrapping_shl(&self, v: &RHS) -> Self;
}
wrapping_impl!(WrappingShl, wrapping_shl, u8, u32);
wrapping_impl!(WrappingShl, wrapping_shl, u16, u32);
wrapping_impl!(WrappingShl, wrapping_shl, u32, u32);
wrapping_impl!(WrappingShl, wrapping_shl, u64, u32);
wrapping_impl!(WrappingShl, wrapping_shl, usize, u32);
wrapping_impl!(WrappingShl, wrapping_shl, i8, u32);
wrapping_impl!(WrappingShl, wrapping_shl, i16, u32);
wrapping_impl!(WrappingShl, wrapping_shl, i32, u32);
wrapping_impl!(WrappingShl, wrapping_shl, i64, u32);
wrapping_impl!(WrappingShl, wrapping_shl, isize, u32);
/// Performs bitwise shift right that wrapps around on overflow.
pub trait WrappingShr<RHS>: Sized + Shr<RHS, Output=Self> {
/// Panic-free bitwise shift-right; yields `self >> mask(rhs)`, where `mask` removes any
/// high-order bits of rhs that would cause the shift to exceed the bitwidth of the type.
///
/// Note that this is *not* the same as a rotate-right; the RHS of a wrapping shift-right is
/// restricted to the range of the type, rather than the bits shifted out of the LHS being
/// returned to the other end. The primitive integer types all implement a `rotate_right`
/// function, which may be what you want instead.
fn wrapping_shr(&self, v: &RHS) -> Self;
}
wrapping_impl!(WrappingShr, wrapping_shr, u8, u32);
wrapping_impl!(WrappingShr, wrapping_shr, u16, u32);
wrapping_impl!(WrappingShr, wrapping_shr, u32, u32);
wrapping_impl!(WrappingShr, wrapping_shr, u64, u32);
wrapping_impl!(WrappingShr, wrapping_shr, usize, u32);
wrapping_impl!(WrappingShr, wrapping_shr, i8, u32);
wrapping_impl!(WrappingShr, wrapping_shr, i16, u32);
wrapping_impl!(WrappingShr, wrapping_shr, i32, u32);
wrapping_impl!(WrappingShr, wrapping_shr, i64, u32);
wrapping_impl!(WrappingShr, wrapping_shr, isize, u32);